Did you notice if she was eating or drinking normally prior to this?
I would seperate her in a quiet area around 70 degrees with minimal noise and no fluctuation in temps. Cover a portion of the side of the cage to keep out drafts. Give her the sugar water and the electrolytes if you have them. Gently try to dip the beak, but make sure she swallows . Don't force her or she could aspirate. You can syringe it to her on the side of her mouth, but again make sure she swallows. Perhaps do 1/2cc at a time and make sure she swallows in between.
Feel her crop tonight - what does it feel like?
Look at her vent - is it clean, any runny poop left on the feathers?
Feel her chest, has she lost weight or feel skinny? Lots of feathers can be deceiving and chickens can lose a bunch of weight without us realizing it. They hide illness well, until they are in crisis.
In the morning feel her crop again and check for poop. The crop should be mostly empty. If its not, please report back as it could be an obstruction, or her system may be shutting down and lost motility for some reason.
If she still isnt eating or drinking in the morning, she may need to get subq fluids immediately at the vet. Then they can hopefully do an assessment, perhaps an xray as well.
Good luck, I hope she makes it!
